Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
protozoology
protozoon
protract
protracted
protractile
protraction
protractor
protrude
protrusile
protrusion
protrusive
protuberance
protuberant
protuberate
protyle
proud
proustite
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

protoporphyrin
pro·to·por·phy·rin [ prtō páwrfərin ]


noun 
Definition:
 
building block of hemoglobin: a purple porphyrin acid that combines with iron to form the deep red of iron-containing proteins such as hemoglobin and cytochrome
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft